Technical Lead - Python

Job Description :

• 10 years of Backend/ Software Engineering experience.
• Hands on production experience with FastAPI (mandatory).
• Expert-level Python knowledge.
• Strong experience with : Relational databases (PostgreSQL/MySQL).
• At least one NoSQL datastore.
• Deep understanding of : Backend architecture patterns.
• Design patterns (GoF, SOLID, DDD concepts).
• Distributed systems fundamentals.
• Experience designing and evolving large-scale systems.
• Practical experience with cloud services and deployments.
• Proven ability to lead technical decisions and architecture discussions.

Nice-to-Have :

• Experience migrating monoliths to microservices (or deciding not to).
• Event-driven or streaming systems experience.
• API gateways, rate limiting, auth systems (OAuth2, JWT).
• Prior experience acting as Senior Backend Developer, Tech Lead or Solution Architect.

Core Responsibilities :

System Design & Architecture :

• Design end-to-end backend systems with a focus on scalability, resilience, and maintainability.
• Define service boundaries, data ownership, and communication patterns.
• Select and apply appropriate architecture patterns :
• Modular monoliths.
• Microservices.
• Event-driven systems.
• Layered and hexagonal architecture.
• Drive trade-off decisions (performance vs cost vs complexity).
• Produce architecture diagrams, ADRs, Data Flow Diagrams and technical design documents.

Backend Engineering :

• Design and develop high-performance backend services using Python and FastAPI.
• Build and maintain RESTful APIs and async services.
• Handle concurrency, background processing, and IO-heavy workloads.
• Enforce clean code, SOLID principles, and testability.
• Lead code reviews with a focus on correctness, performance, and long-term design.

Data Engineering & Storage :

• Design and optimize schemas in RDBMS (PostgreSQL/MySQL) Indexing, query optimization, transactions, isolation levels.
• Design data models for NoSQL systems (MongoDB, DynamoDB, Redis, etc.).
• Choose the right data store based on access patterns and consistency needs.
• Handle migrations, versioning, and backward compatibility.

Distributed Systems :

• Design systems that handle : Partial failures.
• Retries, timeouts, and idempotency.
• Horizontal scaling.
• Experience with message brokers and async communication (Kafka, RabbitMQ, SQS, etc.).
• Understand consistency models, eventual consistency, and data replication.

DevOps & Cloud (Hands-on but not DevOps-only) :

• Work in cloud environments (AWS / Azure / GCP).
• Containerize services using Docker.
• Deploy using CI/CD pipelines.
• Understand Kubernetes concepts (pods, services, autoscaling) or managed alternatives.
• Collaborate with DevOps/SRE on observability, logging, and monitoring.

Technical Leadership :

• Act as technical owner for backend systems.
• Mentor senior and mid-level engineers.
• Set engineering standards and best practices.
• Work closely with product and business stakeholders to translate requirements into technical designs.

Note : Please send Cv only, who can attend the interview weekdays, with short notice period (max 15 days only).